The union working to organize nurses at Orlando Health Inc. has filed charges alleging the hospital system is engaging in unfair labor practices. The hospital denies any wrongdoing.

The documents, revealed earlier today, allege violations at five Orlando Health hospitals. Union officials wouldn’t say how many nurses are involved in the complaints, only that each complaint has at least three to five nurses corroborating the allegations.

“It’s not uncommon for employers to violate the law when employees are organizing a union,” said Jennifer Lemmon, the assistant director of organizing for the National Nurses Organizing Committee, in an interview with Orlando Business Journal. The NNOC filed the complaint with the National Labor Relations Board.

Orlando Health was adamant that it has done nothing wrong. Kena Lewis, spokeswoman for the hospital, Lewis said about half of NLRB complaints are withdrawn or dismissed.

“This is a common tactic used by unions conducting an organizing campaign,” Lewis said. “The documents you’re looking at are allegations, they’re not proven. I don’t know if this has occurred or not. We will cooperate fully with the NLRB if it goes that far.”

The allegations are another example of unions targeting the hospital, and hospitals that are unionized have on average 10 percent-15 percent higher labor costs, which can affect the labor and health care ecosystem. The union issue also could result in more layoffs at the hospital system.